/
dgbmv.go
153 lines (148 loc) · 3.21 KB
/
dgbmv.go
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// Copyright ©2014 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package testblas
import (
"testing"
"gonum.org/v1/gonum/blas"
)
type Dgbmver interface {
Dgbmv(tA blas.Transpose, m, n, kL, kU int, alpha float64, a []float64, lda int, x []float64, incX int, beta float64, y []float64, incY int)
}
func DgbmvTest(t *testing.T, blasser Dgbmver) {
for i, test := range []struct {
tA blas.Transpose
m, n int
kL, kU int
alpha float64
a [][]float64
lda int
x []float64
beta float64
y []float64
ans []float64
}{
{
tA: blas.NoTrans,
m: 9,
n: 6,
lda: 4,
kL: 2,
kU: 1,
alpha: 3.0,
beta: 2.0,
a: [][]float64{
{5, 3, 0, 0, 0, 0},
{-1, 2, 9, 0, 0, 0},
{4, 8, 3, 6, 0, 0},
{0, -1, 8, 2, 1, 0},
{0, 0, 9, 9, 9, 5},
{0, 0, 0, 2, -3, 2},
{0, 0, 0, 0, 1, 5},
{0, 0, 0, 0, 0, 6},
},
x: []float64{1, 2, 3, 4, 5, 6},
y: []float64{-1, -2, -3, -4, -5, -6, -7, -8, -9},
ans: []float64{31, 86, 153, 97, 404, 3, 91, 92, -18},
},
{
tA: blas.Trans,
m: 9,
n: 6,
lda: 4,
kL: 2,
kU: 1,
alpha: 3.0,
beta: 2.0,
a: [][]float64{
{5, 3, 0, 0, 0, 0},
{-1, 2, 9, 0, 0, 0},
{4, 8, 3, 6, 0, 0},
{0, -1, 8, 2, 1, 0},
{0, 0, 9, 9, 9, 5},
{0, 0, 0, 2, -3, 2},
{0, 0, 0, 0, 1, 5},
{0, 0, 0, 0, 0, 6},
},
x: []float64{1, 2, 3, 4, 5, 6, 7, 8, 9},
y: []float64{-1, -2, -3, -4, -5, -6},
ans: []float64{43, 77, 306, 241, 104, 348},
},
{
tA: blas.NoTrans,
m: 6,
n: 3,
lda: 1,
kL: 0,
kU: 0,
alpha: 2.0,
beta: 1.0,
a: [][]float64{
{1, 0, 0},
{0, 1, 0},
{0, 0, 1},
},
x: []float64{1, 2, 3},
y: []float64{-1, -2, -3, -4, -5, -6},
ans: []float64{1, 2, 3, -4, -5, -6},
},
{
tA: blas.Trans,
m: 6,
n: 3,
lda: 1,
kL: 0,
kU: 0,
alpha: 2.0,
beta: 1.0,
a: [][]float64{
{1, 0, 0},
{0, 1, 0},
{0, 0, 1},
{0, 0, 0},
{0, 0, 0},
{0, 0, 0},
},
x: []float64{1, 2, 3, 4, 5, 6},
y: []float64{-1, -2, -3},
ans: []float64{1, 2, 3},
},
{
tA: blas.NoTrans,
m: 3,
n: 5,
lda: 4,
kL: 1,
kU: 2,
alpha: 2.0,
beta: 1.0,
a: [][]float64{
{1, 2, 3, 0, 0},
{1, 3, 6, 9, 0},
{0, 1, 1, 1, 1},
},
x: []float64{1, 2, 3, 4, 5},
y: []float64{-1, -2, -3},
ans: []float64{-1 + 2*(1+4+9), -2 + 2*(1+6+18+36), -3 + 2*(2+3+4+5)},
},
} {
extra := 3
aFlat := flattenBanded(test.a, test.kU, test.kL)
incTest := func(incX, incY, extra int) {
xnew := makeIncremented(test.x, incX, extra)
ynew := makeIncremented(test.y, incY, extra)
ans := makeIncremented(test.ans, incY, extra)
blasser.Dgbmv(test.tA, test.m, test.n, test.kL, test.kU, test.alpha, aFlat, test.lda, xnew, incX, test.beta, ynew, incY)
if !dSliceTolEqual(ans, ynew) {
t.Errorf("Case %v: Want %v, got %v", i, ans, ynew)
}
}
incTest(1, 1, extra)
incTest(1, 3, extra)
incTest(1, -3, extra)
incTest(2, 3, extra)
incTest(2, -3, extra)
incTest(3, 2, extra)
incTest(-3, 2, extra)
}
}